Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..38..327t&link_type=abstract
(International Astronomical Union, Colloquium on UV and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas, Cambridge, M
Astronomy and Astrophysics
Astrophysics
3
Far Ultraviolet Radiation, Solar Limb, Solar Prominences, Spectroheliographs, Astronomical Photography, Emission Spectra, Helium, Skylab Program, Ultraviolet Photography
Scientific paper
A complex eruptive event took place on January 17, 1974, at approximately 19:20 UT in McMath-Hulbert Plage No. 12,686, located near 6 deg N and behind the west limb. The effects were recorded by the XUV spectroheliograph on Skylab from 19:44 UT to 20:46 UT. An eruptive prominence or spray was observed in the He II 304-A line to reach a height of more than 1 solar radius. It was also photographed in many emission lines at temperatures reaching 1 MK in Mg IX. There were at least four other parts of the eruption, each changing character differently with temperature. These first appeared in Ne VII at 0.6 MK, and were recorded in lines of ions up to Fe XVI at 2.6 MK.
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